Is BRIP1 p.Ala55Thr (c.163G>A) pathogenic?

BRIP1 p.Ala55Thr (c.163G>A) is classified Uncertain significance in BRIP1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-11-20). AlphaMissense: likely pathogenic (0.8573); Very rare (popmax 0.000593%, nfe); Associated with Fanconi anemia complementation group J.

What condition is associated with BRIP1 p.Ala55Thr (c.163G>A)?

BRIP1 p.Ala55Thr (c.163G>A) is associated with Fanconi anemia complementation group J, hereditary neoplastic syndrome, hereditary breast carcinoma (ClinVar).

How common is BRIP1 p.Ala55Thr (c.163G>A) in the general population?

BRIP1 p.Ala55Thr (c.163G>A) is very rare (popmax 0.000593%, nfe) (gnomAD).

What do computational predictors say about BRIP1 p.Ala55Thr (c.163G>A)?

AlphaMissense predicts likely pathogenic (score 0.8573) — an in-silico prediction, not a clinical call.

BRIP1 p.Ala55Thr

c.163G>A · rs757909937 · VCV1777013

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.8573 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000593%, nfe)

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Fanconi anemia complementation group J

Computational evidence

Protein change
AlphaMissense	0.8573	likely pathogenic
REVEL	0.32	indeterminate
SaProt	LLR -10.98	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2.2, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 68 kb · p 0.065 · regional, not allelic
Overall
CADD	24.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000593% European (non-Finnish) · 7/1,179,932 alleles

Filtering AF 0.000247% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000159%

Overall 0.000434% 7/1,613,886 alleles · very rare

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: BRIP1
Protein: p.Ala55Thr
Coding: c.163G>A
MANE Select: NM_032043
dbSNP: rs757909937
Type: single nucleotide variant
Location: chr17:61859838 (GRCh38)
Gene constraint: LOEUF 0.848 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 64.19 · 6 PDB
Residue 55: the helicase atp-binding domain

Full BRIP1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Fanconi anemia complementation group J — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary neoplastic syndrome hereditary breast carcinoma

Similar variants

BRIP1 p.Ala55Val Uncertain significance ★★ ⚠ same residue
BRIP1 p.Ala55= Benign/Likely benign ★★ same residue
BRIP1 c.1140+1G>A Likely pathogenic ★★ same condition
BRIP1 c.1141-2A>C Likely pathogenic ★★ same condition
BRIP1 c.1141-2A>G Likely pathogenic ★★ same condition
BRIP1 c.1141-2A>T Likely pathogenic ★★ same condition
BRIP1 c.1340+1G>A Pathogenic/Likely pathogenic ★★ same condition
BRIP1 c.1341-1G>A Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/brip1-p-ala55thr (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown